Regrinding yoke valves



May 6 1924.

F.H.HEHEMANN REGRINDING YOKE VALVES Filed Jan. 23. 1920 dz l ezzlzur:

Patented May 6, 1924.

UNITED STATES 1,493,074 PATENT OFFICE.

FREDERICK H. HEHEMANN, OF CINCINNATI, OHIO, ASSIGNOR TO THE LUNKENHEIMER COMPANY, OF CINCINNATI, OHIO, A. CORPOBATIDN OF OHIO.

REG-BINDING- YOKE VALVES.

Application filed January 23, 1920. Serial No. 353,636.

To all whom it may concern:

Be it known that I, FREDERICK HE- HEMANN, a citizen of the United States, and a resident of the city of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Regrinding Yoke Valves, of which the followin is a full, clear, and exact description, re erence bein had to the drawings forming a part of this specification.

My invention relates to valves which have a re-grinding function, by which is meant that the valve stems may be revolved free of the usual threaded mountin s thereof, to rotate the disks or heads 0 the valves against the valve seats. It also relates to yoke valves, wherein the valve stems in addition to engagement in the casing of the valve structure have also an outer engage ment in a yoke, mounted on the casing.

In general it is the object of my invention to provide a yoke valve of the regrinding type, which has an improved mechanism for facilitating the regrinding operation thereof, and other structural advantages whereby a more desirable construction and mode of operation for valves of this type is obtained.

It is specifically my object to provide a valve stem for yoke valves, which is threaded through a nipple or bushing held in the yoke, the lower end of this bushing being a blank annular extension to serve as a guide for the upper end of the stem, said stem having elsewhere in addition a non-threaded journaled mountin In such a construction the unscrewing of t e bushing from the yoke leaves the stem guided at two points but free to slide and rotate with the yoke in its normal position on the valve housing.

It is further my object to provide for a sliding stuffing box gland, which is not threaded into the yoke, but held by means exterior of the yoke, said means being removable to facilitate the packing of the box.

These objects and other advantages I accomplish by that certain construction and arrangement of parts to be hereinafter more specifically pointed out and claimed.

In the drawing,

Figure 1 is a perspective view of the valve with the stem bushing unscrewed, and'the stem and valve in regrinding position.

Figure 2 is a longitudinal section taken through the center of the valve.

Figure 3 is a detail section of the lower end of the yoke and stuffing box, showing the method of mounting the gland.

The valve has a housing 1, within which is the valve seat 2. The yoke 3 is provided with integral nut portion 4 at its lower end, which is threaded onto the head of the valve housing at 5.

The yoke is formed with a stutling box 6 therein, with the valve stem 7 passing through the box and into the valve housing or chamber. The end of the stem carries any desired valve, of which a preferred form comprises a flanged fitting 8 on the end of the stem, a valve head proper 9, and a nipple 10 threaded into the head proper and servln to rotatably mount the head on the flange fitting. In order to secure the head during regrinding nonrotatably on the end of the stem. the stem is pierced with a hole in which a pin 11 may be inserted, said pin acting to engage a notch 11' in the nipple 10.

T e stufiing box gland 12 is mounted over the valve stem in the usual manner so as to cooperate with the box and the packing therein. Located at the base of the yoke at the open sides thereof are slotted lugs 13, 13, and the head of the gland is formed with corresponding slotted lu s 14, 14. Bolts 15 are employed to secure the lugs of the yoke to the lugs of the gland head, thereby forcing down the lan into the stufling box.

For remova of the gland for repacking or what not, the operator has easy access to the nuts 16 of the said bolts 15 and when the bolts have been loosened they may be entirely removed, so that the operator after sliding the gland up on the stem can insert his packing without interference.

In the upper end of the yoke is threaded a nip le or bushing 17. This bushing is interior y threaded at 18 for engaging the threaded portion 19 of the valve stem. The threads 20 on the outside of the bushing do not run the 'full length of the bushing and are made to have the same pitch as the threads of the stem. These threads are made the same pitch to prevent jammed valves and stripped threads due to endwise travel of the stem when unscrewing the bushing.

hen turned down into the upper end of the yoke, the bushing provides the necessary threaded mounting of the valve stem, but when turned out of the yoke, which may easily be done, since threads are the same 011 the inside and'outside of the bushing, the valve stemis free co tlideup me down ma rotate in the yoke thereby permittin the valve head to he need as a grinding too and, at the same time the ant the bushing will not he Withdrawh from the end of the yoke. During the grinding op:

eration the head is made fast to the stern by means of a pin or nail, as above noted, and the stem is uided in the bushing at the top of the yolie and in the base of the stuffin% boi so that it agrinds true. I

rom the above it-is 'ev-ident'that I- provide a Ver simple mechanism in oke valves 'ior repac ing said valves, and or providing a re rinding function for the valve and'st'ein.

While. no mention has been made 'of equivalent structure in the above des'erip tion, it is not thereh'y intended to exoliide from the scope of'the claims'that follow, that range of equivalent inechanicalexpedifents which would oeourto those skilled in the ere-embod ing a .niere; substitution for the parts set-forth. 7 .Having thus described-my invention, what I claim as new and desire to secure by :Letters Patent is z-- t In a :Vali'eythe-O0mbihati01t-Witli a housing, of a yoke, means integral \i'itlithe yoke 'for motrnting'it on the housing, a valve stem in the .yo'lre, astiufiing box for the yoke and housing assembly, a.:gland for "said box, and Ineans exterior ot the stuffing bor' a'nd engagingthe head of the gland; rfor'maintain'ing'the-gland in 'tlieb'oma'nd a bushing m the yoke for 'maintaining a threaded feng" emeht with 'the stem, said bushing ,being admsta'b-le alon'gfithe stem into and out of threaded enga e nent with 'the yoke without removing the ushi'-n g fromthe yoke.-

2. In a valve, the 'eom'bihation with a housing, of a 'yoke, means 'in'tegr'al with the yoke for mounting it on the-housingfa valve maintaining the gland readed portion pi e" ad ustable along stem-inthe yekey'a stufiin box for yoke and hoi'ising assembly, a and ltor saifl box, and means exterior of the stufling box for in the box, com rism bolts and means on the gland an "the yo 'for engaging saidbolt's'and bushing in the yoke for maintaining a threaded ena' talent with the stem, said bushing being the stem into and out of threaded enga ement with the yoke without removing the ushing from the yoke.

3. a valve; the combination with a Valve holisiii f a stem supporting a yoke having a-sttf 'n'g box .for the istemgand a gland for said stufiili box, and means exteior-:of 'thefstufling $1011 for retaini' the gland therein,saidriiieansmom nising olts, and slotted-ears on the yokeja-ndl theggland for engaging fsai'd; bolts and a bushing in the, yoke aformaintainimga threaded eugagnfeat?with'ithez stem, Said bus ing ei g adj ustab'le fllbng the :et'em: into 1 and; out of threajdedkenga e'n'ientwith -the'f :yokei ivithin otia yoke mountedon-fthe housing -a the gland, whereby the 'biis'hing inay' screwed out of the yoke over the ste'ma.

the hon-'threacledIp'ortion sei'vs'asia shdiiig guide "in th'e th'readedvpontion the yoke; during regrindi-Iig of 'the' valve.

mma- K "Hanan/mun.

nibl'amii riiwith a hens: 

